#include <QCoreApplication>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int age;
    qInfo()<<age;

    age = 21;
    qInfo()<<age;

    age++;
    qInfo()<<age;

    age--;
    qInfo()<<age;

    int older = age * 5;
    qInfo()<<older;

    int younger = older / 3;
    qInfo()<<younger;

    return a.exec();
}
